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      CGI圖文說明教程(11)出錯腳本
                
                  發表時間：2023-12-26             來源：明輝站整理相關軟件相關文章人氣：          
              
      [摘要]錯誤腳本 額外的環境變量包括CGI 1.1 變量傳遞給錯誤腳本。這些CGI 1.1 變量有：REDIRECT_REQUEST ：這是當正確發送給服務器的請求。REDIRECT_URL ：這是導致錯誤的請求URL。REDIRECT_STATUS ：這是如果NCSA HTTPd 已經允許應答的狀態數字...
      錯誤腳本 額外的環境變量包括CGI 1.1 變量傳遞給錯誤腳本。這些CGI 1.1 變量有：

      REDIRECT_REQUEST ：這是當正確發送給服務器的請求。

      REDIRECT_URL ：這是導致錯誤的請求URL。

      REDIRECT_STATUS ：這是如果NCSA HTTPd 已經允許應答的狀態數字和信息。

      另外，NCSA HTTPd在err_string=error_message時作為NCSA HTTPd產生的QUERY_STRING錯誤字符串傳遞。一些錯誤信息可以需要一些不在CGI規范中的文件頭�；谶@個原因，以下給出一個沒有解析的文件頭的腳本，它是用Perl編寫的：

      #!/usr/local/bin/perl

      # 這是一個利用Perl編寫的沒有解析文件頭的CGI 1.1錯誤腳本來處理錯誤請求。

      $error = $ENV{'QUERY_STRING'};

      $redirect_request = $ENV{'REDIRECT_REQUEST'};

      ($redirect_method,$request_url,$redirect_protocal) = split(' ',$redirect_request);

      $redirect_status = $ENV{'REDIRECT_STATUS'};

      if (!defined($redirect_status)) {

      $redirect_status = "200 Ok";

      }

      ($redirect_number,$redirect_message) = split(' ',$redirect_status);

      $error =~ s/error=//;



      $title = "<HEAD><TITLE>".$redirect_status."</TITLE></HEAD>";



      if ($redirect_method eq "HEAD") {

      $head_only = 1;

      } else {

      $head_only = 0;

      }



      printf("%s %s\r\n",$ENV{'SERVER_PROTOCOL'},$redirect_status);

      printf("Server: %s\r\n",$ENV{'SERVER_SOFTWARE'});

      printf("Content-type: text/html\r\n");



      $redirect_status = "<img alt=\"\" src=http://edu.chinaz.com/images/icon.gif>".$redirect_status;

      if ($redirect_number == 302) {

      if ($error !~ /http:/) { 

      printf("xLocation: http://%s:%s%s\r\n",

      $ENV{'SERVER_NAME'},

      $ENV{'SERVER_PORT'},

      $error);

      if (!$head_only) {

      printf("%s\r\n",$title);

      printf("<H1>%s</H1>\r\n",$redirect_status);

      printf("This document has moved");

      printf("<A HREF=\"http://%s:%s%s\">here</A>.\r\n",

      $ENV{'SERVER_NAME'},

      $ENV{'SERVER_PORT'},

      $error);

      }

      } else {

      printf("Location: %s\r\n",$error);

      if (!$head_only) {

      printf("%s\r\n",$title);

      printf("<H1>%s</H1>\r\n",$redirect_status);

      printf("This document has moved");

      printf("<A HREF=\"%s\">here</A>.\r\n",$error);

      }

      }

      } elsif ($redirect_number == 400) {

      printf("\r\n");

      if (!$head_only) {

      printf("%s\r\n",$title);

      printf("<H1>%s</H1>\r\n",$redirect_status);

      printf("Your client sent a request that this server didn't");

      printf(" understand.<br><b>Reason:</b> %s\r\n",$error);

      }

      } elsif ($redirect_number == 401) {

      printf("WWW-Authenticate: %s\r\n",$error);

      printf("\r\n");

      if (!$head_only) {

      printf("%s\r\n",$title);

      printf("<H1>%s</H1>\r\n",$redirect_status);

      printf("Browser not authentication-capable or ");

      printf("authentication failed.\r\n");

      }

      } elsif ($redirect_number == 403) {

      printf("\r\n");

      if (!$head_only) {

      printf("%s\r\n",$title);

      printf("<H1>%s</H1>\r\n",$redirect_status);

      printf("Your client does not have permission to get");

      printf("URL:%s from this server.\r\n",$ENV{'REDIRECT_URL'});

      }

      } elsif ($redirect_number == 404) {

      printf("\r\n");

      if (!$head_only) {

      printf("%s\r\n",$title);

      printf("<H1>%s</H1>\r\n",$redirect_status);

      printf("The requested URL:<code>%s</code> ",

      $ENV{'REDIRECT_URL'});

      printf("was not found on this server.\r\n");

      }

      } elsif ($redirect_number == 500) {

      printf("\r\n");

      if (!$head_only) {

      printf("%s\r\n",$title);

      printf("<H1>%s</H1>\r\n",$redirect_status);

      printf("The server encountered an internal error or ");

      printf("misconfiguration and was unable to complete your ");

      printf("request \"<code>%s</code>\"\r\n",$redirect_request);

      }

      } elsif ($redirect_number == 501) {

      printf("\r\n");

      if (!$head_only) {

      printf("%s\r\n",$title);

      printf("<H1>%s</H1>\r\n",$redirect_status);

      printf("The server is unable to perform the method ");

      printf("<b>%s</b> at this time.",$redirect_method);

      }

      } else {

      printf("\r\n");

      if (!$head_only) {

      printf("%s\r\n",$title);

      printf("<H1>%s</H1>\r\n",$redirect_status);

      }

      }



      if (!$head_only) {

      printf("<p>The following might be useful in determining the problem:");

      printf("<pre>\r\n");

      open(ENV,"env ");

      while (<ENV>) {

      printf("$_");

      }

      close(ENV);

      printf("</pre>\r\n<hr>");

      printf("<A HREF=\"http://%s:%s/\"><img alt=\"[Back to Top]\" src=\"/images/back.gif\"> Back to Root of Server</A>\r\n",

      $ENV{'SERVER_NAME'},$ENV{'SERVER_PORT'});

      printf("<hr><i><a href=\"mailto:webmaster\@%s\">webmaster\@%s</a></i> / ",

      $ENV{'SERVER_NAME'},$ENV{'SERVER_NAME'});

      printf("<i><a href=\"mailto:httpd\@ncsa.uiuc.edu\">httpd\@ncsa.uiuc.edu</a></i>");

      printf("\r\n");




              
              
                 
              
                                            
                              		       
                          
                           		  
        
                            
      
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